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ZFS-AUTO-SNAPSHOT

NAME

zfs-auto-snapshot − take regular ZFS snapshots

SYNOPSIS

zfs-auto-snapshot [options] [-l label] <’//’ | name [name...]>

DESCRIPTION

zfs-auto-snapshot automatically creates, rotates, and destroys snapshots for all your ZFS datasets, and is compatible with both zfsonlinux and zfs-fuse.

OPTIONS

−−default−exclude

By default zfs-auto-snapshot will snapshot all datasets except for those in which the user-property com.sun:auto-snapshot is set to false. This option reverses the behavior and requires com.sun:auto-snapshot to be set to true.

−d, −−debug

Print debugging messages.

−e, −−event=EVENT

Set the com.sun:auto−snapshot−desc property to EVENT.

−−fast

Use a faster zfs list invocation.

−n, −−dry−run

Print actions without actually doing anything.

−s, −−skip−scrub

Do not snapshot filesystems in scrubbing pools.

−h, −−help

Print the usage message.

−k, −−keep=NUM

Keep NUM recent snapshots and destroy older snapshots.

−l, −−label=LAB

LAB is usually ’hourly’, ’daily’, or ’monthly’.

−p, −−prefix=PRE

PRE is ’zfs−auto−snap’ by default.

−q, −−quiet

Suppress warnings and notices at the console.

−−send−full=F

Send zfs full backup. Unimplemented.

−−send−incr=F

Send zfs incremental backup. Unimplemented.

−−sep=CHAR

Use CHAR to separate date stamps in snapshot names.

−g, −−syslog

Write messages into the system log.

−r, −−recursive

Snapshot named filesystem and all descendants.

−v, −−verbose

Print info messages.

−−pre-snapshot=COMMAND

Command to run before each dataset is snapshotted. It is passed the dataset and snapshot name. If it returns non-zero, snapshotting this dataset is aborted.

−−post-snapshot=COMMAND

Command to run after each dataset is snapshotted. It is passed the dataset and snapshot name.

−−destroy-only

Do not create new snapshots, but do destroy older snapshots. Has no effect unless used with −k.

A non-obvious use may be constructon of cron jobs or scripts that run pre-snapshot command(s), then run zfs-auto-snapshot (without −k) to quickly snapshot all datasets, then run post-snapshot command(s) and clean up with zfs-auto-snapshot −−destroy-only.

name

Filesystem and volume names, or ’//’ for all ZFS datasets.

SEE ALSO

zfs(8)

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